CA3083295C

CA3083295C - Crystal form of urat1 inhibitor, and preparation method therefor

Info

Publication number: CA3083295C
Application number: CA3083295A
Authority: CA
Inventors: Jianfei Wang; Yang Zhang; Wenyuan ZHU; Jian Li; Shuhui Chen
Original assignee: Medshine Discovery Inc
Current assignee: Dongbao Purple Star Hangzhou Biopharmaceutical Co Ltd
Priority date: 2017-11-23
Filing date: 2018-11-20
Publication date: 2021-05-04
Anticipated expiration: 2038-11-20
Also published as: EP3712148A1; JP2021504353A; AU2018370811A1; CN111386268B; NZ765226A; EP3712148A4; KR102246619B1; EP3712148B1; US10995087B2; TW201925192A; WO2019101058A1; CA3083295A1; JP6892968B2; KR20200084357A; US20200361917A1; TWI774881B; CN111386268A; ZA202003581B; AU2018370811B2

Abstract

Disclosed are a crystal form of a URAT1 inhibitor, and a preparation method therefor.

Description

PPH
CRYSTAL FORM OF URATI INHIBITOR, AND PREPARATION METHOD
THEREFOR
Cross-reference to related applications [1] CN20 711181960.2, filed on 2017.11.23.
Technical Field

[2] The invention relates to a crystal form of a URAT1 inhibitor and a preparation method therefor.
Background Art

[3] Uric acid is a metabolic product of purine compounds in animals. For humans, due to the lack of uricase capable of continuing to oxidize and degrade uric acid in the body, uric acid is excreted through the intestine and the kidney as the final metabolic product of purine in the human body, wherein renal excretion is the main pathway of uric acid excretion in the human body. The upper limit of the normal uric acid concentration range in the human body is 400 umol/L(6.8 mg/dL) for males and umol/L(6 mg.jd L) for females. Abnormal uric acid levels in the human body are often due to increased uric acid production or decreased uric acid excretion.
Diseases associated with abnormal uric acid levels include hyperuricemia, gout, etc.

[4] Hyperurieemia is a disorder of metabolism of purinc substances in the human body, which results in an increase of the synthesis of uric acid or decrease of excretion of uric acid in the human body and an abnormally high level of uric acid in the blood.
Gouty arthritis refers to when the concentration of uric acid in the human blood exceeds 7mg/dL, uric acid is deposited in the form of monosodium salt in joints, cartilage and kidneys, resulting in painful inflammation due to the overreaction (sensitivity) of the body's immune system. The general attack site is the big toe joint, ankle joint, knee joint, etc. Red, swollen, hot and severe pain appear in the attack site of acute gout, which usually occurs at midnight to wake people from sleep. In the early stage of gout, onset is more common in the joints of the lower limbs. Hyperuricemia is the pathological basis of gout arthritis, and the use of drugs to reduce the concentration of uric acid in the blood is one of the common methods for preventing gouty arthritis.

[5] In Europe and the United States, the onset of hyperuricemia and gout disease is on the rise. Epidemiological studies have shown that the incidence of gouty arthritis accounts for 1-2% of the total population as the most predominant type of arthritis in adult men. Bloomberg estimates that there will be 17.7 million patients with gout in 2021. In China, the survey shows that 25.3% of the population aged 20-74 has high levels of blood uric acid and 0.36% suffers from gout disease. At present, clinical treatment drugs mainly include 1) drugs that inhibit uric acid production, such as Date Recue/Date Received 2020-11-06 PPH
xanthine oxidase inhibitors allopurinol and febuxostat; 2) drugs that promote uric acid excretion, such as probenecid and benzbromarone; 3) inflammation inhibitors, such as colchicine, etc. These drugs have certain defects in treatment, such as poor efficacy, large side effects and high cost, which are the main bottlenecks of their clinical application. It has been reported that 40%-70% of patients do not reach the expected treatment target (<6mg/dL) after receiving standard procedure treatment.

[6] As a uric acid excretion promoter, its mechanism is to reduce the reabsorption of uric acid by inhibiting the URAT I transporter on the brush border membrane of proximal convoluted renal tubules. Uric acid is a metabolic product of purines in the body, which is mainly filtered by the glomeruli in the original form, reabsorbed and re-secreted by renal tubules, and finally excreted from the body through urine and very few of which can be secreted into the intestinal cavity by mesenteric cells.
The SI
segment of the proximal convoluted renal tubule is the place of uric acid reabsorption, and 98% to 100% of the filtered uric acid enters the epithelial cells through the uric acid transporter URAT I and the organic anion transporter OAT4 on the brush border membrane of the tubular epithelial cells. The uric acid that enters the epithelial cells is reabsorbed into the capillaries around the tubules via the renal tubule basal lateral membrane. The S2 segment of the proximal convoluted renal tubule is the place of uric acid re-secretion, and the amount of secretion is about 50% of the amount of glomerular filtration. The uric acid in the renal interstitium first enters the epithelial cells via the anion transporters OAT! and OAT3 on the basal lateral membrane of renal tubular epithelial cells. The uric acid that enters the epithelial cells is then discharged into the renal tubules via another anion transporter, MRP4, on the brush border membrane. The S3 segment of the proximal convoluted renal tubule may be the place of reabsorption after uric acid secretion. The amount of the reabsorption is about 40%
of the amount of glomerular filtration, and similar to the first step of reabsorption, URAT1 may be a key reabsorption transporter. Therefore, if the urate transporter URAT1 can be significantly inhibited, the excretion of uric acid in the body will be enhanced, thereby reducing the level of blood uric acid and thus the possibility of gout attacks.

[7] In December 2015, the FDA of U.S. approved the use of the first URAT1 inhibitor Zurampicl.'1 (Leinuradin at 200mg dose in combination with xanthine oxidase inhibitor X01 (such as Febuxostat, etc.) for the treatment of hyperuricemia and gouty arthritis. However, compared with the use of the xanthine oxidase inhibitors alone, the additive effect of the use in combination is not very significant. The 400mg dose of ZurampicTm was not approved due to the significant toxic side effects (incidence of kidney-related adverse events, especially kidney stone) at high doses.
Therefore, the FDA requires a black-box warning labelling for Zurampic I' to warn medical personnel of the risk of acute renal failure caused by Zurampic which is more common when it is not used in combination with X01, and if Zurampie is used in an over-approved dose, the risk of renal failure is higher. Meanwhile, the FDA required that after Zurampiclm was marketed, AstraZeneca should continue to investigate the safety of Zurampierm on the kidney and eardiovessd. Therefore, the development of a novel Date Recue/Date Received 2020-11-06 PPH
and safe blood uric acid-lowering medicine has become a strong demand in this field.

[8] W02009070740 discloses LeinuradIm, which has the structure as follows:
N-N OH
Br N S 1(1) Content of the invention

[9] The present invention provides a crystal form A of a compound of formula (1) having characteristic diffraction peaks at 20 angles of 7.50 0.2", I 3.04 0.2", and 21.43 0.2(' in the X-ray powder diffraction pattern thereof.
OH

)

[10] In some embodiments of the present invention, the crystal form A has characteristic diffraction peaks at 20 angles of 7.50 0.2 , 9.66 0.2 , 13.04 0.2 , 14.42 0.2 , 17.46+0.2 , 18.57+0.2', 21.43+0.2', and 26.18+0.2' in the X-ray powder diffraction pattern thereof.

[11] In some embodiments of the present invention, the crystal form A has an XR.PD
pattern as shown in Figure 1.

[12] In some embodiments of the present invention, the XRPD pattern analysis data of the crystal form A is as shown in Table 1:

[13] Table 1: XRPD pattern analysis data of crystal feint A
No 20-Angle d-Spacing Relative No 20-Angle d-Spacing Relative intensity intensity (*) (A) (/0) (A) (%) I
1 7.495 11.786 7.0 28 27.320 3.262 0.5 ,=
9.660 9.148 2.8 29 27.795 3.207 1.1 i 3 , 12.208 7.244 0.3 30 28.531 3.126 1.8 Date Recue/Date Received 2020-11-06 PPH
4 13.590 6.510 0.5 31 28.809 3.096 6.1 1 -"H........---13.044 6.782 32.4 32 29.611 3.014 4.2 6 13.751 6.435 0.4 33 , 29.910 2.985 2.3 7 13.768 6.427 0.5 34 30.611 2.918 4.0 8 14.422 6.136 4.5 35 30.703 2.910 3.5 .
....
9 15.524 5.704 7.9 36 31.362 2.850 1.0 17.465 5.074 2.8 37 31.517 2.836 5.1 11 18.573 4.773 30.2 38 32.527 2.751 3.5 i---12 18.551 4.779 28.6 , 19 33.358 , 2.684 4.3 13 20.156 4.402 0,5 40 33.795 2.650 6.3 -

14 20.268 4.378 1.0 41 34.482 2.599 9.7 20.417 4.346 1.6 42 35.189 2.548 0.3 -16 20.513 4.326 1.6 43 , 35.441 2.531 0.7 17 21.432 4.143 , 100.0 44 36.131 2.484 0.6 +-18 21.765 4.080 7.4 . 45 36.042 2.490 0.8 19 22.285 3.986 0.7 46 36.418 2.465 0.4 = -:
22.830 3.892 13.9 47 36.787 2.441 i 0.7 -21 22.978 3.867 16.6 48 37.100 2.421 j 1.3 _....._.....õ ____________ i 1 "1-22 23.589 1.769 5.2 49 , 37.326 2.407 1.8 23 24.217 3.672 1.6 50 37.851 2375 ! 5.2 24 24.820 3.584 2.7 51 38.190 2.355 0.4 i 25.261 3.523 5.4 52 , 38.572 2.332 1.8 26 25.583 3.479 0.4 53 39.239 2.294 ,i 0.5 .1--.
27 26.183 3.401 9.2 _. _ [14] In some embodiments of the present invention, the crystal form A has an endothermic peak with an onset point of I69.42 3 "C in the. differential scanning calorimetry curve thereof

[15] In some embodiments of the present invention, the crystal form A has a DSC

Date Recue/Date Received 2020-11-06 PPH
pattern as shown in Figure 2.

[16] in some embodiments of the present invention, the crystal form A has a weight loss of 0.04491% at 100 3 'C in the thermogravimetric analysis curve thereof

[17] In some embodiments of the present invention, the crystal form A has a TGA
pattern as shown in Figure 3.

[18] The present invention also provides a crystal form B of the compound of formula (1) having characteristic diffraction peaks at 20 angles of 9.88 0.2", 10.56 0.2", and 20.38 0.2" in the X-ray powder diffraction pattern thereof.

[19] In some embodiments of the present invention, the crystal form B has characteristic diffraction peaks at 20 angles of 9.88 0.2 , 10.56 0.2 , 12.23 0.2 , 13.04. 0.2", 14.62 0.2 , 17.57 0.2 , 20.38 0.2", and 26.89 0.2 in the X-ray powder diffraction pattern thereof.

[20] In some embodiments of the present invention, the crystal form B has an XRPD
pattern as shown in Figure 4.

[21] In some embodiments of the present invention, the XRPD pattern analysis data of the crystal form B is as shown in Table 2:

[22] Table 2: XRPD pattern analysis data of crystal form B
Relative Relative No 20-Angle d.-Spacing No 20- d-Spacing (0) (A) Angle (") (A) intensity intensity , 1 _ 3.315 26.6304 52.6 . 27 23,675 3.7549 9.9 2 3.62 , 24.3886 25.2 28 , 24.344 . 3.6533 3.4 3 _ 9.885 8.9405 31.4 29 75.292 3.5184 15,8 .
4 10.559 . 8.3711 75,6 30 25.843 3,4447 27.1 _ 12.233 , 7.2291 1 9.9 _ 31 , 26.889 3.313 40.2 6 13.04 6.7839 19.7 32 27.456 3.2458 7.7 7 . 13.376 , 6.6139 12.9 , 33 , 28.11 3,1717 33.4 8 13.686 6.4646 22 34 28.522 3.1269 .
10.3 9 14.27 6.2017 3 35 29.04 3.0723 15.9 14.62 6.0538 26.8 36 29.294 3.0462 16.9 11 . 15.46 5,7269 8.6 37 29.554 3.02 6.1 12 .. 15.861 5.583 i 12.9 38 _ 29.966 2.9794 8.7 Date Recue/Date Received 2020-11-06 PPH
13 16.52 5.3616 5.6 39 30.163 2.9604 11.2 14 17.573 5.0427 23.4 40 30.495 2.9289 9.7 15 18.017 4.9195 4.9 41 30.935 2.8883 12.6 16 18.546 4.7801 6.2 42 31.426 2.8443 7.7, 17 19.036 4.6582 29.8 43 31.982 2.7961 5.5 18 19.31 4.5929 19.2 44 32.45 2.7568 72.1 19 19.803 4.4794 56.7 45 33.418 2.6792 7.1 20 20.379 43541 100 46 34.583 2.5915 4.3 21 1, 20.737 4.2798 16.2 47 36.14 2.4833 6.9 22 21,09 4,709 10,5 48 36.667 2,4488 5

23 21.745 4.0837 14.1 49 37.562 2.3925 2.6

24 22.043 4.0291 9.3 50 38.311 2.3474 4.3

25 22.548 3.94 17.6 51 38.899 2.3133 6.1

26 23.179 3.8342 26.2 =
[23] in some embodiments of the present invention, the crystal form B has an endothermic peak with an onset point of 163.51 3 'C in the differential scanning calorimetry curve thereof.
[24] In some embodiments of the present invention, the crystal form B has a DSC
pattern as shown in Figure 5.
[25] In some embodiments of the present invention, the crystal form B has a weight loss of 0.1191% at 120 3 C, and a weight loss of 0.6282% from 120 3 C to 153.60- 3 in the thermogravirnctric analysis curve thereof.
[26] In some embodiments of the present invention, the crystal foini B has a TGA
pattern as shown in Figure 6.
Technical effects

[27] The compound of formula (I) of the present invention exhibits superior in vitro inhibitory activity against URAT1-mediated '4C-uric acid transport on HEK293 cell lines stably transfected with URAT1 (uric acid transporter) gene. The compound of formula (I) of the present invention has good stability of drug metabolism, and also greatly improves the oral absorption bioavailability of the drug in the meantime; the crystal forms thereof have better solubility and stability. Therefore, the compounds of the present invention have good prospects for medicine.

Date Recue/Date Received 2020-11-06 PPH
Definition and description

[28] Unless otherwise stated, the following terms and phrases used herein are intended to have the following meanings. A
particular phrase or term without specific definition should not be considered to be uncertain or unclear, but should be understood in line with its ordinary meaning. When a trade name is used herein, it is intended to refer to its corresponding commercially available product or its active ingredient.

[29] The intermediate compounds of the present invention can be prepared by various synthetic methods well known to those skilled in the art, including the specific embodiments listed below, the embodiments formed by their combination with other chemical synthesis methods, as well as equivalent alternatives well known to those skilled in the art, and preferred embodiments include but are not limited to the examples of the present invention.

[30] The chemical reaction of the specific embodiment of the present invention is carried out in an appropriate solvent, which should be suitable for the chemical changes of the present, invention and the reagents and materials required. In order to obtain the compound of the present invention, those skilled in the art sometimes need to modify or select the synthesis steps or reaction processes based on the existing embodiments.

[31] Hereinafter, the present invention will be described in details by reference to the examples which do not indicate any limitation to the present invention.

[32] All solvents used in the present invention are commercially available and can be used without further purification.

[33] The solvent used in the present invention is commercially available.
The following abbreviations are used in the present invention: DCM stands for dichloromethan.e; DMF stands for N,N-dirrieth.ylformamide; DMSO stands for dimethyl sulfoxide; Et0H stands for ethanol; WOE stands for methanol; TFA stands for trifluoroacetic acid; TsOH stands for p-toluene sulfonic acid; mp stands for melting point; EtS0:5H stands for ethanesulfonic acid; MeS031-1 stands for methanesulfonie acid;
ATP stands for adenosine triphosphate; HEPES stands for 4-hydroxyethylpiperazine ethanesulfonic acid; EGTA stands for ethylene glycol bis(2-aminocthyl ether) tetraacetic acid; MgC12 stands for magnesium dichloride; MnC12 stands for manganese dichloride; DTT stands for dithiothreitol.
X-ray powder diffractorneter (XRPD)

[34] Instrument model: Brukeri NI D8 Advance X-ray Diffractometer

[35] Test method: approximately 10-20 mg sample was used for XRPD detection.

[36] The detailed XRPD parameters were as follows:

[37] X-ray tube: Cu, kit, (.X.=1.54056 A).

[38] X-ray tube voltage: 40kV, X-ray tube current: 40mA

Date Recue/Date Received 2020-11-06 PPH

[39] Divergence slit: 0.60min

[40] Detector slit: 10.50trun

[41] Anti-scatter slit: 7.10mm

[42] Scan range: 4-40 deg (or 3-40 deg)

[43] Step diameter: 0.02 deg [441 Step length: 0.12 second [45] Rotation speed of sample tray: 15rpm Differential Scanning Calorimeter (DSC) [46] Instrument model: TA Q2000" Differential Scanning Calorimeter [47] Test method: A sample (¨I mg) was placed in a DSC aluminum pan for testing, and the sample was heated from 25 "C to 300"C at a heating rate of 10 "C/min under N, at a flow rate of 50 mL/min.
Thermal Gravimetric Analyzer (TGA) [48] Instrument model: TA Q5000 IR thermal gravimetrie analyzer [49] Test method: A sample (2-5 mg) was placed in a TGA platinum pot for testing, and the sample was heated from room temperature to a weight loss of 20% at a heating rate of 10 cCirnin under N2 at a flow rate of 25 mlimin.
Brief Description of the Drawings [50] Figure I is the XRPD pattern of Cu-Ka radiation of the crystal form A.
[511 Figure 2 is the DSC pattern of the crystal form A.
[52] Figure 3 is the TGA pattern of the crystal form A.
[53] Figure 4 is the .XRPD pattern of Cu-Ka radiation of the crystal form B.
[54] Figure 5 is the DSC pattern of the crystal form B.
[55] Figure 6 is the TGA pattern of the crystal form B.
Detailed description of the embodiments [56] In order to understand the content of the present invention better, the following detailed description will be made in combination with specific examples, but the specific embodiments arc not a limitation to the content of the present invention.

Date Recue/Date Received 2020-11-06 PPH
1571 Example I: Preparation of the compound of formula (1) N-N
Br __ <'`--ii F s js...
N--OH
---, F
(I ) [58) Synthetic route:
) o ) ) .\.o o c) 0 _________________ I F7(- s _____________________________________ 9 ____________ F-7 F 9 F
S --- \ -----0 F F Elr 0 ik.....

) _.--___________ r F --.. F ---F
F

NN
<N-N N 1,Y 0 IJHaHCI
l'iWkSH s.,71,µ, F-F.-..---.-- 8 __ 1 ?Cql ---------- 1.-F
F ---F

N- N
z N
-Pi .
N- Ns-VsliON
/ S CH
-1.- 4.,...-----To----As 0 F, F----(7-..,il F F
b' 11 0 ) [59] Step 1: synthesis of compound 2 [60] 4.5 L of dimethyl sulfoxide was added to a three-necked flask (10 L), and potassium teo-butoxide (836.66 g, 7.46 rool, 2 eq) was added under stirring.
The mixture was stirred for 10 minutes after the completion of the addition until the mixture was dissolved to be clarified. And then the internal temperature of the reaction solution was cooled to 20-25 C using an ice water bath. A solution of compound 1 (500.05 g, 3.73 mol, I eq) in dimethyl sulfoxide (500 mL) was added dropwise to the above solution, and stirred for 30 minutes after the addition. Then, carbon disulfide Date Recue/Date Received 2020-11-06 PPH
(283.86g. 3.73 mol, I eq) was added dropwise, and after the completion of the addition, the reaction was continued for 30 minutes under stirring. Then, ethyl bromeacetate (1250 g, 7.46 mol, 2 eq) was added dropwise, and the mixture was reacted for 2 hours under stirring after the addition. Finally, potassium carbonate (515.52 g, 7.46 mol., 1 eq) was added, and the internal temperature was raised to 65"C, and the reaction was continued for 8 hours under stirring. After the completion of the reaction, the reaction solution was cooled to room temperature. The reaction solution was diluted with ethyl acetate (I OL), then 1M hydrochloric acid (2 L) and water (2 L.) were added and the mixture was stirred for 10 minutes and was allowed to stand and separate. The aqueous phase was separated, and the organic phase was washed with water (2 Lx3).
The aqueous phases were combined and extracted with ethyl acetate (3 L). All organic phases were combined and washed with saturated brine (2 Lx2). The organic phase was dried with an appropriate amount of anhydrous sodium sulfate, the desiccant was removed by filtration, and the solvent was removed from the filtrate under reduced pressure to obtain a crude product. In the same scale, 6 batches were fed in parallel, and a black-red oily crude product was obtained after the combination. After the crude product was allowed to stand for 72 hours, a large amount of solid was precipitated.
Ethanol (2 L) was added thereto, the mixture was stirred for 30 minutes, filtered, the filter cake was collected and dried under vacuum to obtain compound 2. 11-1 NMR
(400 MHz, CDC13) 6: 4.32 (q, 7.2 Hz, 2I-1), 4.19 (q, .J 7.2 Hz, 2H), 3.56 (s, 2H), 3.25 (t, 6.8 Hz, 2H), 3.19 (t, ./ 14.4 Hz, 21-0, 2.26-2.17 (m, 2.1-1), 1..37 (t, J = 7.2 Hz, 3H), 1.27 (t, I= 7.2 Hz, 3H); MS m/z 364.8 [M+H].
[61] Step 2: synthesis of compound 3 [62] Compound 2 (241.00 g, 0_66 mot) was dissolved in ethanol (1 L) and placed in an autoclave (5 L). Raney nickel' (120 g) was added under the protection of argon, followed by the addition of ethanol (2 14. The autoclave was installed and replaced with argon for three times and then with hydrogen for three times, and filled with hydrogen to a pressure of 2.0 MP in the autoclave, the mixture was stirred and heated to 85"C in the autoclave and reacted for 28 hours. The reaction was stopped, and the reaction system was cooled to room temperature, the reaction solution was filtered, and the filter cake was rinsed with ethanol for three times, 0.5 L each time. The filtrates were combined and then dried by rotary evaporation to obtain compound 3. IFI
NMR
(400 MHz, CDCI3) 6: 7.09 (s, 1H), 4.26 (q, J = 7.2 Hz, 2H), 3.20 (t, J = 6.8 Hz, 2H), 3.12 (t, J = 14.4 Hz, 2H), 2.20-2.10 (m, 2H), 1.30 (t, J = 6.8 Hz, 3H); MS
m/z= 247.0 [M+H]
[63] Step 3: synthesis of compound 4 [64] Compound 3 (406.2 g, 1.65 mol, 1 eq) was dissolved in acetonitrile (6 L), then N-bromosuccinimide (1484,2 g, 6.60 mol, 4 eq) was slowly added, and the resulting reaction solution was reacted under stirring for 12 hours at 23-25 "C. After the completion of the reaction, the reaction liquid was concentrated to about 1.0 L. The solid was removed by filtration, and a saturated solution of sodium bisulfite (1 L) was added to the filtrate and stirred for 10 minutes. Ethyl acetate was added and extracted Date Recue/Date Received 2020-11-06 PPH
for three times, 2L each time. The organic phases were combined and dried by adding an appropriate amount of anhydrous sodium sulfate. The desiccant was removed by filtration, and the filtrate was concentrated under reduced pressure.
Petroleum ether (3L) was added to the residue, and stirred thoroughly for 30 minutes at 30 'C.
After filtration, the filter cake was washed five times with petroleum ether, 200 mL
each time, until no product remained in the filter cake. All organic phases were combined and dried by rotary evaporation to obtain a crude product. Petroleum ether (100 mL) was added to the crude product, stirred thoroughly, filtered, and the filter cake was collected and dried under vacuum to obtain compound 4. 111 NMR (400 MHz, CDC13) 6: 4.24 (q, ..1,= 7.2 Hz, 2H), 3.19 (t, J= 6.8 Hz, 211), 2.95 (t, J 14.4 Hz, 211), 2.17-2.07 (m, 211), 1.29 (t, = 7.2 Hz, 3H).
[65] Step 4: synthesis of compound 5 [66] Compound 4 (340.21 g, 1.05 mol), cyclopropylboronic acid (108.12 g, 1.26 mol), anhydrous potassium phosphate (444.98 g, 2.10 rnol), palladium acetate ( /2.03 g, 53.58 mmol) and 2-dicyclohexyl phosphorus-T,4',6'-triisopropylbipheny1 (23.86 g, 50.05 mmol) were added to a mixed solvent of toluene and water (10:1, 3.4 L/340 mL), and after the atmosphere in the reaction flask was replaced with nitrogen for six times, it was placed in an oil bath. The reaction solution was heated at an internal temperature of 80 C, and was reacted under stirring at this temperature for 16 hours.
After the completion of the reaction, the reaction solution was cooled to room temperature, and trithiocyarturie acid (6.51 g suspended in 34 niL of ethanol) was added to the reaction solution and stirred for 0.5 hour. In a similar scale (300.00 g of compound 4), 5 batches were fed in parallel and combined for processing. The resultant was filtered, the organic phase was separated, and the aqueous phase was extracted with ethyl acetate (250 mLx2). The organic phases were combined and dried by adding an appropriate amount of anhydrous sodium sulfate. The desiccant was removed by filtration, and the filtrate was concentrated under reduced pressure to obtain a black oily crude product.
After the crude product was allowed to stand for 20 hours, a yellow solid was precipitated, and petroleum ether (3 L) was added thereto and stirred for an hour.
After filtration, the filter cake was dried under vacuum to obtain compound S.

NMR (400 MHz, CDC13) 6: 4.29 (ci, 1= 7.2 Hz, 2H), 3.23 (t, = 6.4 Hz, 2H), 3.16 (t, = 14.8) Hz, 2H), 2.24-2.18 (m, 21-1), 1.95-1.85 (m, H), 1.35 (t,1 6.8 6.8 Hz, 3H), 1.09-1.07 (m, 2H), 0.77-0.75 (m, 2H).
[67] Step 5: synthesis of compound 6 [68] Compound 5 (619.27 g, 2.16 mol) was added to a solution of sodium hydroxide (173.55 g, 4.33 mol) in mixed ethanol and water (3 L/3 L), and the reaction solution was heated to an internal temperature of 60 'C. and reacted under stirring for 3 hours.
After the completion of the reaction, the reaction solution was cooled to room temperature. In a similar scale (750.17 g of compound 5), one batch was fed in parallel and combined for processing. The combined reaction solution was extracted with petroleum ether (4L). The organic phase was separated, and the organic phase was backwashed twice with water (1.5 Lx 2). The aqueous phases were combined and Date Recue/Date Received 2020-11-06 PPH
concentrated under reduced pressure to remove ethanol. Water was added to the aqueous phase to dilute to 13 L. then diluted hydrochloric acid (3M) was slowly added to adjust the pH to 2, and a large amount of light yellow solid precipitated.
After filtration, the filter cake was rinsed with water (3.0 L x2). The filter cake was collected after being filtered under vacuum, and dried under vacuum at 60 "C in a vacuum oven to obtain compound 6. IH NMR (400 MHz, DMSO-do) 6: 12.79 (brs, 1.H), 3.23 (t, J
= 14.8 Hz, 211), 3.07 (t, J= 6.8 Hz, 2H), 2.27-2.20 (m, 2H), 2.19-2.02 (m, 1H), 1.09-1.04 (in, 2H), 0.68-0.66 (in, 2H).
[69] Step 6: synthesis of compound 7 [70] Compound 6 (641.27 g, 2.48 mol), triethylamine (754.07 g, 7.45 niel) and diphenylphosphoryl azide (1025.34 g, 3.73 mol) were added to tert-butanol (6.5 L) under stirring. The reaction solution was placed in an oil bath at 100 'V and heated for 16 hours. After the completion of the reaction, the reaction solution was cooled to room temperature. In a similar scale (650.00g of compound 6), 4 batches were fed in parallel and combined for processing. The reaction solution was combined and concentrated under reduced pressure to remove tert-butanol. The remaining black residue was dissolved with ethyl acetate (10 L), and the resulting ethyl acetate solution was washed with aqueous sodium hydroxide solution (5%, 5.0 Lx2), and then washed with saturated brine (5.0 L). An appropriate amount of anhydrous sodium sulfate was added for drying. The desiccant was removed by filtration, and the filtrate was concentrated under reduced pressure to obtain a brown-black solid crude product. A
solid precipitated after standing. Petroleum ether (8L) was added to the crude product and stirred for 2 hours. After filtration, the filter cake was rinsed with petroleum ether (1 L) in portions, and the filter cake was dried under vacuum at 60 C in a vacuum oven to obtain compound 7. 'H NMR (400 MHz, C:DC13) 6: 6.31 (brs, 3.11 (t,J= 14.8 Hz, 2H), 2.66 (t, J = 6.8 Hz, 214), 2.23-2.15 (in, 2H), 1.82-1.75 (m, 1H), 1.51 (s, 9H), 0.94-0.90 (in, 2H), 0.68-0.65 (in, 211.).
[71] Step 7: synthesis of compound 8 [721 Compound 7 (1199.17 g, 3.64 mol) was added to ethyl acetate (2 L), and after stirring evenly, a solution of hydrogen chloride in ethyl acetate (4 L., 16.00 mol, 4 M) was added. The reaction solution was reacted at 15"C for 2.5 hours and then placed in a warm water bath. at 40 'V to react for another 2 hours. After the completion of the reaction, a large amount of dark red solid precipitated. After filtration, the filter cake was rinsed with ethyl acetate (2.0 L) in portions. The filter cake was dried under vacuum at 60 "C in a vacuum oven to obtain compound 8. H NMR (400 MHz, DMS0-d6) 6: 3.17 (t, 14.8 Hz, 2H), 2.82(1,1 = 6.8 Hz, 21-1), 2.25-2.15 (in, 21-I), 2.00-1.94 (in, 1H), 0.99-0.95 (in, 2H), 0.58-0.54 (in, 2H); MS nilz= 229.8 [M+11-HC1r.
[73] Step 8: synthesis of compound 9 [74] In a 3 L three-necked flask, compound 8(301.25 g) was added to tetrahydrofuran (600 rnL), and the mixture was cooled under stirring to an internal temperature of 0-10 "C in an ice-water bath. Diisopropylethylamine (635.72g) was added dropwise, and Date Recue/Date Received 2020-11-06 PPH
the ice water bath was removed after the completion of the addition, and the mixture was stirred at an internal temperature of 10-15 C for about 10 minutes. After filtration, the filter cake was washed with tetrahydrofuran (100 mLx2). The filtrates were combined to obtain a solution. A for use.
[75] Tetrahydrofuran (2 L) was added to a 5 L reaction flask containing thiophosgene (257.48g). The mixture was cooled under stirring to an internal temperature of T. in an ice-water bath, and the solution A was slowly added dropwise, the addition was completed within about 5.5 hours of heat preservation, and stirring was continued for 10 minutes. After the completion of the reaction, the reaction mixture was filtered, and the filter cake was washed with tetrahydrofuran (150 mL x2). The filtrates were combined and concentrated under reduced pressure to remove the solvent.
Tetrahydrofuran (400 mL) was added to the residue and dissolved to obtain a solution B for use.
[76] Hydrazine hydrate (112.94 g) was added to tetrahydrofuran (2.5 L), and cooled under stirring in an ice water bath to an internal temperature of 5-10 'C. The solution B was added dropwise, the addition was completed within about 2 hours of heat preservation, and stirring was continued for 10 minutes. After the completion of the reaction, the reaction was stopped. The ice water bath was removed, N,N-dimethylformamide dimethyl acetal (333.45 g) was added, and heated to an internal temperature of 60-65 'C, and after keeping the temperature and reacting for 3 hours, the reaction was stopped.
[77] The reaction solution was dried by rotary evaporation, ethyl acetate (2 L) and pure water (1 L) were added to the residue, and stirred evenly. The pH was adjusted to 5-6 with 10% hydrobromic acid, and the mixture was continually stirred for 5 minutes, and was allowed to stand for 10 minutes. The solution was separated to obtain the aqueous phase. The organic phase was washed with pure water (500 mLx2), The aqueous phases were combined and extracted with ethyl acetate (1 L), and the organic phases were combined and dried by adding an appropriate amount of anhydrous sodium sulfate. The desiccant was removed by filtration, and the filtrate was concentrated to dryness under reduced pressure to obtain a crude product of compound 9. N-heptane (2.0 L) and tere-butyl methyl ether (150 mL) were added to the crude product, the mixture was slurried(rotation speed of stirring 550 rpm) for 18 hours. After filtration, the filter cake was washed with n-heptane (150 mL). The filter cake was collected, and dried under vacuum at 60 C in a vacuum oven to obtain compound 9. NMR
(400 MHz, CDC11) 6: 7.82 (s, I H), 3.20 (t, J = 14.8 Hz, 2H), 2.74 (t, J=6.8 Hz, 2H), 2.28-2.10 (in, 211), 1.98.1.82 (m, 1.06-1.02 211), 0.75-0.71 (in, 211); MS tniz =313.9 [M+E1]1-.
[78] Step 9: synthesis of compound 10 [79] Acetonitrile (3 L) was added to a 5 L three-necked flask. Compound 9 (303.25 g) and potassium carbonate (261.83 g) were added first under stirring. Then, methyl 2-bromoisobutyrate (203.85 g) was added, and after replacing the reaction system with Date Recue/Date Received 2020-11-06 PPH
nitrogen, it was heated to an internal temperature of 60-65 "C, the temperature was maintained, and the mixture was reacted for 2 hours. After the completion of the reaction, the heating was stopped, and the mixture was naturally cooled to 15-20 "C
under stirring. After filtration, and the filter cake was washed with ethyl acetate (100 mLx3). The filtrate was combined and concentrated under reduced pressure to dryness to obtain a crude product The crude product was purified by column chromatography (mobile phase: ethyl acetatein-heptane = 1:5-2:1) to obtain compound 19. H NMR
(400 MHz, CDC1.1) 6: 8.20 (s, 1H), 3.68 (s, 3H), 3.19 (t, I = 14.4 Hz, 2H), 2.57 (t,1= 6.8 Hz, 2H), 2.22-2.12 (m, 2H), 1.93-1.83 (m, 1H), 1.67 (s, 6H) ), 1.08-1.03 (m, 2H), 0.73-0.69 (m, 2H); MS in/ 414.0 [M+H]'.
[80] Step 10: synthesis of compound 11 [81] Acetonitrile (3.17 L) was added to a 5 L three-necked flask. Compound 10 (317.22 g) and thiocarbonyl diimidazole (26.94 g) were added under stirring, and the mixture was maintained at 16-20 C and stirred for 5 minutes. N-bromosuceinimide (158.60g) was added, the temperature was maintained, and the mixture was stirred for 30 minutes. After the completion of the reaction, the reaction was stopped.
After filtration, the filtrate was concentrated under reduced pressure to obtain a black crude product. The crude product was purified by column chromatography (mobile phase:
ethyl acetatein-heptane ¨ 0-50%) to obtain 340,62 g of yellow solid crude product.
This crude product was dissolved in ethyl acetate (3.50 L), and then washed with pure water (700 tut- x4). The organic phase was separated, and the organic phase was dried by adding an appropriate amount of anhydrous sodium sulfate. The desiccant was removed by filtration, and the filtrate was concentrated to dryness under reduced pressure to obtain compound 11. 111 NMR (400 MHz, CDC13) 6: 3.73 (s, 3H), 3.22 (t, 1= 14.4 Hz, 2H), 2.53 (1,1= 6.8 Hz, 211), 2.24-2.14 (m, 2H), 1.95-1.91 (m, 1H), 1.71 (d, 4.4 Hz, 6H), 1.11-1.07 (rn, 214), 0.78-0.74 (m, 2H); MS = 491.7 [M+H], 493.7 [m+H-F-2].
[82] Step 11: synthesis of compound of formula (I) [831 Tetrahydrofuran (1.2 L) was added to a 5 L reaction flask, and compound (243.03 g) was added under stirring. After dissolution and clarification, pure water (1.2L) was added, then lithium hydroxide monohydrate (125.46g) was added, and the mixture was maintained at 20-25"C and stirred for 2.5 hours. After the completion of the reaction, the reaction was stopped. The reaction solution was concentrated under reduced pressure at 40 C to remove the organic solvent. Pure water (1 L) was added to the residue, and the organic phase was separated by reverse extraction with tert-butyl methyl ether (300 mL). The water phase was placed in a 10 L three-necked bottle, and the temperature was cooled to 5-10 C in an ice bath. The pH was adjusted to 2-3 with 40% hydrobromic acid solution, and a large amount of light yellow solid precipitated. The stirring was continued for 30 minutes, and the pH_ was re-measured to be 2-3 and remained unchanged. The stiiring was continued for 20 minutes and filtered. The filter cake was washed with pure water (150 mLx3). The filter cake was collected, and pure water (1500 mL) was added and slurried at room temperature Date Recue/Date Received 2020-11-06 PPH
for an hour. After filtration, the filter cake was washed with pure water (150 mLx2), and the filter cake was collected and dried under vacuum at 40 C for 3 hours to obtain the compound of formula (1). iff NMR (400MHz, CD30D) 6: 3.27 (t, J=- 15.6 Hz, 2H), 2.60-2.47 (m, 2H), 2.27-2.17 (m, 2H), 2.10-2.03 (m, .1H), 1.68 ( d, = 1.2 Hz, 6H), 1.15-1.10 (m, 21-1), 0.80-0.71 (m, 2H); MS rez = 477.99 [1\4+H]', 480.1 [M+H+2r.
1841 Example 2: preparation of crystal form A of compound of formula (I) [85] The compound of formula (1) (50 mg) was added to a glass bottle, methanol (0.4 rulL) was added separately, and stirred into a suspension or solution. The above suspension sample was placed in a constant temperature mixer (40"C), shaken at for 60 hours, and then centrifuged to collect the sample. The aforementioned dissolved and clarified sample was evaporated at room temperature and then centrifuged to collect the sample. The above sample was placed in a vacuum drying oven (40 "C) and dried overnight, and the crystal form was detected by XR.PD, the crystal form of the final product was the crystal form A of the compound of formula (I).
[86] The compound of formula (1) (50 mg) was added to a glass bottle, ethyl acetate (0.4 mL) was added separately, and stirred into a suspension or solution. The above suspension sample was placed in a constant temperature mixer (40"C), shaken at for 60 hours, and then centrifuged to collect the sample. The aforementioned dissolved and clarified sample was evaporated at room temperature and then centrifuged to collect the sample. The above sample was placed in a vacuum drying oven (40 "C) and dried overnight, and the crystal form was detected by XRPD, the crystal form of the final product was the crystal form A of the compound of formula (1).
1871 Example 3: preparation of crystal form B of compound of formula (1) [88] The compound of formula (1) (50 mg) was added to a glass bottle, tetrahydrofuran (0.4 mL) was added, and stirred until the solution was clarified. The aforementioned dissolved and clarified sample was evaporated at room temperature, and then centrifuged to collect the sample. The above sample was placed in a vacuum drying oven (40 "C) and dried overnight, and the crystal form was detected by XRPD, the crystal form of the final product was the crystal form B of the compound of formula (1).
1891 Example 4: solubility test of crystal form A of compound of formula (I) [90] I. Preparation of diluent and mobile phase [91] Diluent: 300 in.L of pure water and 100 mL of pure acetonitrile were accurately measured, and mixed in a 1 L glass bottle, ultrasonically degassed for 10 minutes for use.
[92] Mobile phase A: 0.1% phosphoric acid aqueous solution [93] For example: 2.0 mL of phosphoric acid was added into 2000 rnL of water, and the mixture was ultrasounded for 10 minutes, mixed evenly, and naturally cooled to room temperature, as mobile phase A.
Date Recue/Date Received 2020-11-06 PPH
[94] Mobile phase B: acetonitrile.
[95] 2. Preparation of the control solution (using crystal form A per se as the control sample) [96] 5 mg of crystal form A was accurately weighed and placed in a sample bottle, and mL of diluent was added, and the mixture was ultrasounded for 5 minutes, naturally cooled to room temperature, mixed evenly, and labeled as working control solution STD-1.
[97] 5 nig of crystal form A was accurately weighed and placed in a sample bottle, and 10 mL of diluent was added, and the mixture was ultrasounded for 5 minutes, naturally cooled to room temperature, mixed evenly, and labeled as working control solution STD-2.
[98] 3. Preparation of linear solution [99] The aforementioned working control solution STD-1 was successively diluted by 1 time, 10 times, 100 times, 1000 times and 2000 times, and was labeled as linear solutions Li, L2, L3, 1.4 and L5.
[100] 4. Solubility test [101] 6 mg of crystal form A was accurately weighed respectively and added into 8 rtiL glass bottle, and then 3 mL of different solvents (0.1N hydrochloric acid solution, 0.01N hydrochloric acid solution, purified water, pH 3.8 buffer solution, pH
4.5 buffer solution, pH 5.5 buffer solution, pH 6.0 buffer solution, pH 7.4 buffer solution, pH 6.8 buffer solution) were accurately added to prepare the suspensions. A stirrer was added to the above suspensions, and the suspensions were fully stirred at 37 C in dark. After stirring, the solids in the pH 7.4 buffer solution and the pH 6.8 buffer solution were completely dissolved, 6 mg of crystal foi in A were accurately weighed respectively, and added to the buffer solutions, and stirred fully again to prepare suspensions.
After stirring for 4 hours and 24 hours, samples were taken and centrifuged. The solutions were filtered with a fiber membrane and their concentrations were measured by HPLC.
The HPLC analysis method was shown in Table 3.
[102] Table 3: _HPLC analysis methods Instrument Agi lent rm 1200 High Performance Liquid Chromatograph Chromatographic AseentisT" Express C18 (4.(mm x100 mm., 2.7 pm) column Mobile phase A A= 0.1% phosphoric acid aqueous solution Mobile phase 13 Acetonitrite Flow rate 1.5 mL/min Injection volume 5.0 uL

Date Recue/Date Received 2020-11-06 PPH
Detection wavelength I 250 nm Column temperature 40"C
Diluent 3/1 (WV) pure water/acetonitrile Run time 18 min Time (min) I A (/0) B (%) 0.00 95 5 13.00 5 95 Gradient 15.00 5 95 .......
15.01 I 95 5 18.00 95 5 [103] The results are shown in Table 4:
[104] Table 4: Solubility test results of crystal form A in 9 vehicles Solubility Vehicle (4 hrs) (mg/mL) (24 hrs) (mg/mL) 0.1 N HC1 <LOQ <LOQ
0.01 N HC1 <LOQ <LOQ
pH 3.8 buffer solution <LOQ <LOQ
pH 4.5 buffer solution 0.001 0.001 pH 5.5 buffer solution 0.066 0.066 pH 6.0 buffer solution 0.214 0.204 pH 6.8 buffer solution 1.961 1.840 pH 7.4 buffer solution 3.820 4.049 Purified water 0.045 0.058 [105] Note: LOQ means below the detection limit; the above buffer of different pH
refers to specific salt solution of each pH.
[106] Conclusion: crystal form A of compound of formula (I) has good solubility in high pH buffer.
[107] Test. Example 1: In vitro evaluation of compounds of formula (I) Date Recue/Date Received 2020-11-06 PPH
[108] 1. Preparation of each working solution [109] 1) DMSO was used as the solvent of a 200-fold working solution, the storing solution was diluted to a 200-fold working solution at each administration concentration.
[110] Crystal form A: 0, 0.002, 0.006, 0.02, 0.06, 0.2 and 0.6 minoli;
[11I] Lcsinurad: 0,0.06, 0.2, 0.6, 2,6. and 20 turnol/L.
[112] 2) Hanks balanced salt solution (without CI") was used as the solvent for the 2-fold working solution of transport protein URAT1, and then 200-fold working solution in 1) was diluted by 100 times to obtain a 2-fold working solution at each administration concentration.
[113] 3) Hanks balanced salt solution (without CI-) was used to prepare a 2-fold working solution of the drug transport protein URAT I racholabeled substrate, and then mixed with the same volume of 2-fold working solution of each concentration in 2), and the mixture was mixed evenly for use.
[114] 2. Method of administration [115] 2.1. Uptake cell inhibition experiment [116] The cell culture medium used in the uptake inhibition experiment was DMEM medium added with 10% FBS (containing penicillin and streptomycin).
[117] After resuscitation and subculture of the human drug transporter-overexpressed cell line (HEK293A-URAT1) and empty vector cells (HEK293A-pcDNA3.1), the adherent cells that grew well were selected, and digested with trypsin to disperse them into single cell suspension. Then the cell density was adjusted to 2.0-3.0>< 105 cells/rnL with the culture medium, and then the cell suspension was inoculated into a 24-well cell culture plate at a volume of I mL/well. The plate was incubated in an incubator at 37 C, 5% CO2 and saturated air humidity for 2-3 days to make the cells grow throughout each well.
[118] First, the culture medium in the culture plate was removed, and it was washed once with Hanks buffer salt solution (without Cl). After that, Hanks buffer salt solution (without Cl) at 37 C was added to each well and incubated for 10 min.
Then, 500 t.tL of a solution of probe substrate solution containing radiolabel was used to replace the Hanks buffer salt solution (without Cl) in the 24-well plate and the administration was started. After the administration (2 min), the reaction was terminated with the respective pre-cooled buffer salt solution, and the cells were washed 3 times. Then, 400 [it of Amnion NaOH was added to each well to lysc the cells.
The cell lysate was taken into a scintillation vial, and 3 [MC__ of Aquasol-2INA scintillation liquid was added, and the radioactive intensity in the sample was measured by using Tri-Carb '1 2910TR liquid scintillation instrument. In the cell transport test, 3 wells (n-----3) were set for each concentration, positive control and mock control.

Date Recue/Date Received 2020-11-06 PPH
H 19] 2.2. Data processing [120] 2.2.1. Inhibition calculation [121] The uptake value of the transporter cells in the administration group only containing the radiolabeled substrate (deducting the uptake value Uo of the background group, i.e., the empty vector cells) was defined as 100% (control, tic), which was used as the standard to calculate the percentage ( ---) of the uptake value U of each administration group added with the compound to be tested after deducting the background relative to the uptake value Lie of the control group, and calculate the inhibitory rate (IR) for transporter activity at each concentration to express the strength of inhibitory effect of the compound on the transporter. The formula is as follows:
[122] 1R"'1 -[100K(U-U0)/(Uc-U0)] %
[123] Three repeats (i.e. n=3) were set for each administration concentration.
Mean standard error (SD) was calculated using statistical formulas in Microsoft Excel 2010 software.
[124] According to the inhibitory rate (IR) for each transporter at each administration concentration, 105,0 value, the effect of the compound on the transport activity of the drug transporter was calculated through Prism5.0 in combination with the Forecast function in Microsoft Excel 2010 software.
[125] 2.2.2. Statistical method [126] The t-test was used to analyze the difference of the average of each sample (P
<0.05 was regarded as significant difference).
[127] 3. Experimental results [128] The compound of formula (I) and lesinurad had a significant inhibitory effect on the uptake of 14C-LIA mediated by uric acid transporter URATI (p <0.001), with IC.50 of 0.034 ninon and 6.01 ttmol/L, respectively. The inhibitory effect of the compound of formula (1) on URAT1 was about 177 times that of the reference compound lesinurad, and thus had more significant inhibitory effect.
11291 Test Example 2: Pharmacokinetic evaluation of the compound of formula [130] Experimental purpose: Plasma pharmacokineties of male and female SD rats after single intravenous injection and intragastric administration as well as repeated intragastrie administration for 8 days for the compound of formula (1).
[131] Experiment procedure:
[132] 1. In this experiment, 12 SD rats, half males and half females, were provided by Beijing Vital River Laboratory Animal Technologies Co., Ltd., and were divided into 2 groups according to the similarity of their body weights, each group had 3 females and 3 males. The details of the administration protocol and blood collection Date Recue/Date Received 2020-11-06 PPH
protocol were shown in Table 5 and Table 6, respectively.
[133] Table 5: Administration protocol Number of Conee Admini Dosag animals per ntrati stration Administ Administra Group group on volume Solvent ration tion No.
route frequency (mg/1i (mg/in Male Female (rrilikg) IL) 5'Vri 1 3 3 20 1.0 20 5% IV Single (10%HP-P-CD) 0.5%
3 3 4.0 1.0 4.0 (w/v) PO Single MC
All animals fasted every other night before the first day of administration and resumed to be fed 4 hours after the administration.
[134] Note: DMS0 means dimethyl sulfoxide; HP-13-CD means hydroxypropy1-13-cyclodextrin; MC means methyl cellulose;
[135] 1V means intravenous administration; PO means intragastric administration.
[136] Table 6: Blood collection protocol Group Animal No. Sample time point (hr) No.
Male Female RI, R2, R3 R4, R5, R6 0.083, 0.25, 0.5, 0.1, 2, 4.6, 8, 10, 24 h before and after administration 2 R7, RS, R9 R10, RIL
R12 0.25, 0.5, 1, 2, 4, 6, 8, 10, 24 h before and after administration Anticoagulant: K.7-ED1'A
[137] Sample collection and analysis methods [1381 0.15 mL of blood samples from experimental animals were collected by jugular vein puncture, and immediately transferred to labeled centrifuge tubes containing K2-EDTA (0.5 M), and the plasma was separated by centrifugation within 30 minutes (centrifugation condition: 3000 g, 4 "C, 15 minutes). Plasma concentrations were measured using a validated LC/MS/MS analysis method;
plasma concentrations were processed using a non-compartment model of WinNonlinTM
Date Recue/Date Received 2020-11-06 PPH
Version 6,3 (Pharsight, Mountain View, CA) phartna.cokineties software, and the pharmacokinetic parameters were calculated using the linear logarithmic trapezoid method.
[139] 3.Experimental results and conclusions [140] After intravenous administration of SD rats, the compound of formula (1) was rapidly distributed in the body and slowly cleared. The plasma clearance rate of male rats was 9.762E2.29 mUmin/kg, and the steady state apparent volume of distribution (Vd,..) was 1,65 0.440 L/kg, TI/2 and AUCo-inf were 2.52 0.671 h and 3530 723 ng.h/mL, respectively; the plasma clearance rate of female rats was 6.41 0,656 mL/min/kg, and the steady state apparent volume of distribution (Vdsi.) was 1.55 0.408 L/kg, elimination half-life (TI/2) and AUCo-inr were 3.04 1.12 hand 5240 544 ng-h/mL, respectively.
[141] After a single intragastric administration of 4.0 mg/kg of the compound of formula (1) to the SD rats , the peak concentration (C.) of male rats was 1130 ng/mL, and the AUCtkia. was 2510 ng-himL, peak time Tmay, was 0.417 0.144 h, elimination half-life (T112) was 1.72h; the peak concentration (Cm:) of female rats was 2110 1350 ng/mL, AUCti-inf was 9010 4670 ng = himL, peak time Tma, was 0.667 0.289 h, and the elimination half-life (T1/2) was 3.48 0.835 h. The bioavailability of male rats was 35.6%, and the bioavailability of female rats was 86.0%, (Note:
AUC.o.inr represents the area under the plasma concentration-time curve from time zero to infinity (extrapolation)).
[142] In conclusion, the compound of formula (I) greatly improves the stability of drug metabolism, and also greatly improves the oral absorption bioavailability of drugs.

Date Recue/Date Received 2020-11-06

Claims

PPH
What is claimed is:

1. A crystal form A of a cornpound of formula (1) having characteristic diffraction peaks at 20 angles of 7.50 0.2 , 13.04 0.2 , and 2143 0.2 in the X-ray powder diffraction pattern thereof, ______________________________________ ¨N
Br OH

)

2. The crystal form A as defined in claim 1õ wherein the crystal form A has characteristic diffraction peaks at 20 angles of 7.50+0.2 , 9.66+0.2 , 13. 04 0.2 (), 14.42 0.2', 17.46 0.2", I 8. 57 0.2 , 21.43 0. 2', and 26.18+0.2 in the X-ray powder diffraction pattern thereof.

3. The crystal form A as defined in claim 1 or 2, wherein the crystal forrn A
has an endothermic peak with an onset point of 169.42 3 "C in the differential scanning calorimeny curve thereof.

4. The crystal form A as defined in claim 1 or 2, wherein the crystal forrn A
has a weight loss of 0.04491% at 100+3 "C in the thermogravimetric analysis curve thereof.

5. A crystal form B of a compound of formula (I) having characteristic diffraction peaks at 20 angles of 9.88+0.2 , 10.56+0.2 , and 20.38+0.2 in the X-ray powder diffraction pattern thereof.

6. The crystal form B as defined in claim 5, wherein the crystal form B has characteristic diffraction peaks at 20 angles of 9.88+0.2 , 10.56+0.2 , 12.23 0.2 , 13 .04 0.2 , 14 .62 0.2 , 17.57 0.2 , 20.38 0. 2 , and 26.89+0.2 in the X-ray powder diffraction pattern thereof.

7. The crystal form B as defined in claim 5 or 6, wherein the crystal form B has an endotheimic peak with an onset point of 163.51 3 "C in the differential scanning calorirnetry curve thereof.

8. The crystal form 13 as defined in claim 5 or 6, wherein the crystal form B has a weight loss of 0.1191% at 120+3 "C, and a weight loss of 0.6282% from 120+3 "C to 153.60+3 ')C in the thermogravimetric analysis curve thereof.

Date Recue/Date Received 2020-11-06